What is the function of an emergency fuel quantity indicator?

An emergency fuel quantity indicator serves a critical role in ensuring the pilot has access to fuel level information even if the primary fuel gauge fails. This backup system is essential for maintaining situational awareness regarding fuel reserves, particularly in emergency situations where accurate fuel information is vital for safe operations.

When the primary gauge is compromised, the emergency fuel quantity indicator allows the pilot to assess whether there is sufficient fuel to complete the flight or return safely. This can help prevent conditions related to fuel starvation, which could lead to engine failure. The use of redundancy in fuel monitoring systems enhances overall safety and trust during flight operations, especially under abnormal circumstances.

Other options, such as increasing fuel flow or automatically refilling fuel tanks, do not accurately reflect the purpose of the emergency fuel quantity indicator. The indicator is focused specifically on providing critical information rather than altering fuel management processes. Displaying fuel temperature, while relevant to understanding fuel performance, is not the function of the emergency fuel quantity indicator.